import type { PrivateBlobByteRange, PrivateBlobDeleteResult, PrivateBlobHandle, PrivateBlobProvider, PrivateBlobPutInput, PrivateBlobRangeReadResult, PrivateBlobReadResult, PrivateBlobReadUrl, PrivateBlobReadUrlOptions } from "./types.js";
export declare function registerPrivateBlobProvider(provider: PrivateBlobProvider): void;
export declare function unregisterPrivateBlobProvider(id: string): void;
export declare function listPrivateBlobProviders(): PrivateBlobProvider[];
export declare function getActivePrivateBlobProvider(): PrivateBlobProvider | null;
/**
 * The general provider for this request. Providers that only claim some puts
 * (`handles`) are never returned here, unless config selects one by id.
 */
export declare function getActivePrivateBlobProviderForRequest(): Promise<PrivateBlobProvider | null>;
export declare function isPrivateBlobConfiguredForRequest(): Promise<boolean>;
export interface PrivateBlobStorageReadiness {
    configured: boolean;
    providerId: string | null;
}
export declare function getPrivateBlobStorageReadinessForRequest(): Promise<PrivateBlobStorageReadiness>;
export declare function setPrivateBlobPublicUploadFallbackEnabled(enabled: boolean): void;
export declare function putPrivateBlob(input: PrivateBlobPutInput): Promise<PrivateBlobHandle | null>;
export declare function readPrivateBlob(handle: PrivateBlobHandle): Promise<PrivateBlobReadResult>;
/**
 * Reads part of a blob. Providers that can't read a range natively, encrypted
 * blobs, and the encrypted public-upload fallback load the whole blob and
 * slice it. Throws `PrivateBlobRangeError` when the range is malformed or
 * starts past the end.
 */
export declare function readPrivateBlobRange(handle: PrivateBlobHandle, range: PrivateBlobByteRange): Promise<PrivateBlobRangeReadResult>;
/**
 * A link that reads the blob straight from storage until it expires, or null
 * when the blob's provider can't hand one out (the encrypted public-upload
 * fallback never can). Only call after proving the caller may read the blob.
 */
export declare function getPrivateBlobReadUrl(handle: PrivateBlobHandle, options: PrivateBlobReadUrlOptions): Promise<PrivateBlobReadUrl | null>;
export declare function deletePrivateBlob(handle: PrivateBlobHandle): Promise<PrivateBlobDeleteResult>;